Low-power low-voltage differential class-AB OTAs for SC circuits

Author

Carvajal, R.G. ; Galan, J. ; Ramirez-Angulo, Jaime ; Torralba, A.

Author_Institution

Departamento de Ingenieria Electronica Escuela Superior de Ingenieros, Seville Univ., Spain

Volume

38

Issue

22

fYear

2002

fDate

10/24/2002 12:00:00 AM

Firstpage

1304

Lastpage

1305

Abstract

Two new differential class-AB operational transconductance amplifiers (OTAs) for SC circuits that operate with a supply voltage of less than two transistor threshold voltages are introduced. They make use of a new class-AB pseudodifferential pair to generate signal currents much larger than quiescent currents. Both OTAs have been designed to operate with a supply voltage of V_DD=1.1 V, using a 0.35 μm CMOS technology. Simulation results for a load capacitance (C_L) of 1 pF show 15 MHz gain-bandwidth product with a quiescent power consumption of 10 μW.

Keywords

CMOS analogue integrated circuits; differential amplifiers; low-power electronics; operational amplifiers; switched capacitor networks; 1 pF; 1.1 V; CMOS technology; biasing current; common-mode operation; differential class-AB OTA; fast complete charge transfer; fast settling response; load capacitance; low-power low-voltage OTA; pseudodifferential pair; simulation; switched capacitor circuits;

fLanguage

English

Journal_Title

Electronics Letters

Publisher

iet

ISSN

0013-5194

Type

jour

DOI

10.1049/el:20020958

Filename

1047060